Are You Designing or Inspecting?
Chisnell, Dana E.
Guidelines are statements of direction. They’re about looking to the future and what you want to incorporate in the design. Guidelines are aspirational. Heuristics challenge a design with questions. The purpose of heuristics is to provide a way to “test” a design in the absence of data and primary observation by making an inspection. Heuristics are about enforcement. Both guidelines and heuristics are typically broad and interpretable. They’re built to apply to nearly any interface. But they come into play at different points in a design project.